Concrete block machine ejector mechanism



Aug. 21, 1951 w. a. SCHUTT 2,565g001 CONCRETE BLOCK MACHINE EJECTORMECHANISM Original Filed April 5, 1948 2 Sheets-$heet 1 Attomeus.

Aug. 21, 1951 w, sc u -r 2,565,001

I CONCRETE BLOCK MACHINE EJECTOR MECHANISM Original Filed April 5, 19482 Sheets-Sheet 2 l I I I lgn plwwwlw IN VEN TOR.

A iforneus Patented Aug. 21, 1 951 UNITED STATES PATENT OFFICE Iass'atoi CONCRETE BLooK MACHINE EJECTOR MECHANISM Walter G; S'chutt,Adrian, Micha assignor to .Stearrls Manufacturin Mich.,3a corporation ofg Company, Adrian, Michigan Original application April '3, 1948, SerialNo; 18,798. Divided and this application Novem her a, 1949, Serial No.125,269

7 Claims. 1 This invention relates to a brake for a concrete blockmolding machine or similar machines. It is the object of the inventionto provide :a brake which will check the movement of a second set of.blocks, as two sets are ejected from the ma;-

chine before .the blocks are lifted off the receiv ing arms.

This application is a division of my application Serial No. 18,798,entitled Conveyor and Pallet Hoist for. Concrete Block Machines, filedApril 3, 31948. In that application a system for taking pallets and theblocks from the concrete block machines and depositing them in thedrying racks and then returning the pellets tothe conveyor and feedingthe pallets back into the concrete block machine is described and:claimed. One of the chief features of that application is the using ofa special host which can take two pallets and blocks at one time off theprojecting arms of the machine, deposit two pallets together with theblocks in a drying rack and thenelectroma'gnetic'ally pickup two emptypallets from the drying rack and deposit them back on the conveyor.perm-its much more rapid operation of the concrete block molding machineand handling of the blocks inasmuch as two pallets are handled eachtime. One of the di-fiiculties .of ejecting two pallets with blocks ontothe-supporting arms :is the liability of the second ejected palletcolliding with the first ejected pallet. To prevent this I have deviseda special form of mechanism which properly positions the first ejectedpallet "at the end of the arms and stops the second pallet lb'e'fore fitis projected into contact with the first set of blocks. ;This will bemore particularly described.

hereinafter.

Referring to the drawings:

Fig. 1 shows part of the concrete block machine together with the,proiectingarms which support the pallets and blocks when they areejected from the machine.

Fig. 2 is a cross section taken on the line 2-2 of Fig. 1.

Fig. 3 is an enlarged view looking at the inside of one of the worksupporting arms and showing my braking mechanism before it is activatedto effect braking action.

Fig. 4 is a similar view showing the first pallet and blocks ejectedfrom the machine and the braking mechanism in position to check thesecond set of blocks and pallet.

Fig. 5 is a plan view of the two work supporting arms showing in dottedlines the first pallet and set of blocks ejected from the machine.

Fig. 6 is a section taken on the line 6 6 of Fig.3.

Fig. 7 is a detail of the arm supporting stanchion of the machineshowing how the bolt receiving recess is provided with clearance topermit considerable adjustment of the arms for the purpose of alteringthe angle of the runway or arms as shown by comparing the full line withthe vdottedline showing of Fig. 1.

I designates the concrete block molding machine which is moreparticularly described in the aforementioned parent application..Suifice it to say here that .2 is a mold which is shown inFig. 1,stripped from the finished concreteblock 3 which rests on a pallet 4.which is ejected from the concrete blOck machine bymeans of a pusher 5which isanangle-bar 6 connected with the reciprocating bars 1, which inturn is operated bylbar 8 and connecting rod 9. As the connectingrodpushes the bar 8 forward the links Ill raise the cross bar 5 and itengages the pallet 4 and pushes the pallet out onto the runway whichcomprises a ipai-r of Work supporting arms I l and [2. Thesearms-support the studs l3 un -which turn theroll- .ers 14. The pallet,when pushed by the pusher '5 rides forward on the rollers 14 of therunway and the first pallet and set of blocks will be stopped by thepallet stopper l5 which .isadju'stable in elevation bymeans of theslotandscrew arrangement [6.

The braking apparatus comprises the pivoted arm Ill which has the shoe.118. .It will be seen that the shoe I8 is slightly elevated above the;1evel-.0f the rolls in Fig. 3, and this is the normal position due togravity. The rear braking .shoe

l9 .and .-its appurtenances have .a greater moment than the left handarm I; and the shoe 18.

Consequently the shoe t8 will naturally be elevated. When the firstpallet with "the set .of

blocks, usually three, is thrust out of the machine-by the pusher 5,this pallet strikes the rel ef braking lever [9a and the shoe l9.

supporting arms II and I2.

vated shoe I B depresses it and throws up the The braking shoe I9 isalso pressed upwardly by means of the coil springs 26. It will be seenthat the now inclined shoe is directly in the path of the second palletand set of blocks and this forms a very effective brake of the movementof the second pallet and the second set of blocks and is arranged so asto stop the second pallet before there is a collision with the firstpallet.

The proper timing in stopping the pallets and the blocks can be achievedby adjusting the Work The more the inclination of the arms, the fasterthe blocks will ride out of the machine on the rollers; compare the fullline showing with the dotted line showlng--this dotted line showing isof course an extreme position. The work receiver arms H and I2 areconnected by a cross bar 22. This connects the arms with the stanchions2|. The bolt 23 forms a fulcrum on which the cross member 22, togetherwith the work supporting arms H and I2 can be tilted when the screw bolt24 is released from the block 25. There is one block on each end of thecross member 22. By releasing the bolt 24 and by reason of the amount ofclearance 26 (see Fig. 1) that there is around this screw bolt, it ispossible to vary the, inclination of the arms as is shown in Fig. 2.This is desirable in order to give just the proper movement to theblocks as they are ejected from the machine and coordinate the movementof the blocks with the braking effort. For instance, in cold weatherwhen the lubricant is somewhat congealed, it will be necessary to adjustthe arms for greater declination because the rollers will not turn soeasily. In hot weather when the grease or oil on the rollers is thin, itwill be necessary to raise the arms some to cut down the rate ofmovement of the pallets and the sets of blocks.

However, with this arrangement in conjunction with the pusher of theconcrete block molding machine, the second set of blocks with itssupporting pallet is slowed up by the braking action and will notcollide with the first set of blocks, hence the machine may manufacturetwo sets of blocks before the blocks are removed. These blocks, asalready stated, are removed by a hoist that has outstanding arms thatpass under the two pallets and lifts the pallets with their load off thearms and places the pallets with the finished blocks in a drying rackthat is described more thoroughly in the parent application.

What I claim is:

1. A runway in combination with a concrete block machine having areciprocating pusher comprising a pair of arms projecting outwardly fromthe machine and arranged to form a track or guide for pallets pushed outof the machine and arranged to receive the pallets and braking means onthe said arms for automatically braking the movement of a pallet pushedout of the machine to prevent it overthrowing beyond its proper positionupon the runway.

2. A runway in combination with a concrete block machine having areciprocatin pusher comprising a pair of arms projecting outwardly fromthe machine and arranged to form a track or guide for pallets pushed outof the machine and arranged to hold a plurality of pallets and brakingmeans on the said arms for automatically braking the movement of thesecond loaded pallet pushed out of the machine to prevent it fromcolliding with the first pallet pushed out of the machine, the saidbraking means comprising one or more levers secured to the arms andhaving front ends depressed by the first ejected pallet to cause therear end of the lever, which has a braking shoe, to rise to brakingposition in the path of the second loaded pallet coming out of themachine.

3. The combination claimed in claim 2 in which the pair of arms carriesa plurality of rollers on which the pallets roll to their positions ofrest on the runway.

4. The combination claimed in claim 2 in which the arms are adjustableto alter the inclination of the runway to coordinate the movement of thepallets and the blocks with the braking means.

5. The combination claimed in claim 2 in which the lever has a shoe atthe forward end to be contacted by the first pallet to throw up the rearend of the lever and a shoe at the rear end to contact and brake themovement of the second pallet ejected from the machine.

6. The combination claimed in claim 2 in Which the brake lever has acontact shoe at the forward end which is normally in the path of thefirst pallet and set of blocks by reason of the lever being overbalancedand in which there is a braking shoe at the rear end which is projectedup into the path of the second pallet when the first shoe is depressedby contact With the first pallet.

'7. The combination claimed in claim 2 in which the lever comprises acontact shoe at the for- .ward end which is normally in the path of thefirst pallet by reason of the overbalance of the lever, and a brakingshoe at the rear end projected upwardly by one or more springs and whichshoe forms a spring activated brake or drag on the second pallet ejectedfrom the machine when the front end of the lever is overbalanced by theforce of the first pallet and its blocks.

WALTER G. SCHUTT.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 381,241 Hiatt Apr. 17, 1888521,023 Gates June 5, 1894 1,325,167 Olson Dec. 16, 1919 1,716,664Prince June 11, 1929 2,297,330 Schoepfer Sept. 29, 1942 FOREIGN PATENTSNumber Country Date 691,109 France July 1, 1930

